Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-09-13
2005-09-13
Caldwell, Andrew (Department: 2137)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S188000, C713S152000, C713S153000, C713S168000, C380S030000, C380S201000, C380S251000, C380S262000, C705S051000, C705S057000, C705S067000
Reexamination Certificate
active
06944765
ABSTRACT:
A method of authenticating anonymous users while reducing potential for “middleman” fraud includes the step of constructing a puzzle in response to information received from a software user. The puzzle includes the received information. The puzzle is sent to the user by a software provider. The user solves the puzzle and returns the solution to the provider. The puzzle includes a portion of a value derived from an encrypted “cookie” and an exponentiation of the derived value. The cookie includes information about the user.
REFERENCES:
patent: 5241599 (1993-08-01), Bellovin et al.
patent: 5311596 (1994-05-01), Scott et al.
patent: 5724425 (1998-03-01), Chang et al.
patent: 5768382 (1998-06-01), Schneier et al.
patent: 5796952 (1998-08-01), Davis et al.
patent: 5841870 (1998-11-01), Fieres et al.
patent: 5917615 (1999-06-01), Reifman et al.
patent: 5970143 (1999-10-01), Schneier et al.
patent: 6141010 (2000-10-01), Hoyle
patent: 6148083 (2000-11-01), Fieres et al.
patent: 6151676 (2000-11-01), Cuccia et al.
patent: 6301660 (2001-10-01), Benson
Menezes, Alfred, Paul van Oorschot, and Scott Vanstone, The Handbook of Applied Cryptography, 1996, pp. 402-403.
Merkle, Ralph C. “Secure Communications Over Insecure Channels” Communications of the ACM 21(4): 294-299 (1978).
Rivest, et al. “Time-Lock Puzzles and Timed-Release Crytpo” pp. 1-8 (Feb. 21, 1996).
Back, Adam “Hash Cash-A Partial Hash Collision Based Postage Scheme” pp. 1-5. (printed from website www.cypherspace.org/˜adam/ on Apr. 25, 2000).
Hawkes Philip M.
Rose Gregory G.
Caldwell Andrew
Callahan Paul
Choi Jae-Hee
Minhas Sandip (Micky) S.
Qualcomm Inc.
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